code: def valueChanging(param, value):
      print("Value changing (not finalized): %s %s" % (param, value))
  
file_path: pyqtgraph/pyqtgraph/examples/parametertree.py
imports: from _buildParamTypes import makeAllParamTypes
  import pyqtgraph
  from pyqtgraph.Qt import QtWidgets
  import pyqtgraph.parametertree.parameterTypes
  from pyqtgraph.parametertree import Parameter, ParameterTree
label_desc: Use image node_id 2 for calling a global function with example usage: valueChanging(param, value) without return types